ARM: EXYNOS: Add ARCH_EXYNOS and reorganize arch/arm/mach-exynos

The arch/arm/mach-exynos4 directory (CONFIG_ARCH_EXYNOS4) has
made for plaforms based on EXYNOS4 SoCs. But since upcoming
Samsung's SoCs such as EXYNOS5 (ARM Cortex A15) can reuse most
codes in current mach-exynos4, one mach-exynos directory will
be used for them.

This patch changes to CONFIG_ARCH_EXYNOS (arch/arm/mach-exynos)
but keeps original CONFIG_ARCH_EXYNOS4 in mach-exynos/Kconfig to
avoid changing in driver side.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/include/mach/debug-macro.S

@@ -0,0 +1,35 @@
+/* linux/arch/arm/mach-exynos4/include/mach/debug-macro.S
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Based on arch/arm/mach-s3c6400/include/mach/debug-macro.S
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/* pull in the relevant register and map files. */
+
+#include <mach/map.h>
+
+	/* note, for the boot process to work we have to keep the UART
+	 * virtual address aligned to an 1MiB boundary for the L1
+	 * mapping the head code makes. We keep the UART virtual address
+	 * aligned and add in the offset when we load the value here.
+	 */
+
+	.macro addruart, rp, rv, tmp
+		ldr	\rp, = S3C_PA_UART
+		ldr	\rv, = S3C_VA_UART
+#if CONFIG_DEBUG_S3C_UART != 0
+		add	\rp, \rp, #(0x10000 * CONFIG_DEBUG_S3C_UART)
+		add	\rv, \rv, #(0x10000 * CONFIG_DEBUG_S3C_UART)
+#endif
+	.endm
+
+#define fifo_full fifo_full_s5pv210
+#define fifo_level fifo_level_s5pv210
+
+#include <plat/debug-macro.S>